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Method for intermittent application of particulate material

  • US 6,139,912 A
  • Filed: 05/10/1999
  • Issued: 10/31/2000
  • Est. Priority Date: 05/10/1999
  • Status: Expired due to Term
First Claim
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1. A method of applying particulate material to a substrate, the method comprising the steps of:

  • providing a substrate;

    providing a continuous supply of particulate material from a supply source to a valve having a powder application phase and a recycle phase;

    disposing the valve to the powder application phase to allow passage of the particulate material by free-fall therethrough and to prevent conveying of the particulate material to the supply source;

    dispensing a measured amount of the particulate material through the valve onto at least a portion of a surface of the substrate;

    disposing the valve to the recycle phase to prevent dispensing of the particulate material onto the substrate and allow passage therethrough to the supply source; and

    conveying the particulate material back to the supply source.

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